Table 1.

 Summary of baseline characteristics and follow-up data by procedure type in patients undergoing cemented or uncemented hip arthroplasty. Figures are numbers (percentage) unless stated otherwise

	Cemented (n=154 996)	Uncemented (n=120 017)	Overall (n=275 013)
Baseline characteristics
Age (years):
Mean (SD)	73.2 (8.7)	66.7 (10.1)	70.4 (9.9)
Median	73.8	67.0	71.2
Interquartile range	68.0-79.2	60.5-73.7	64.2-77.3
Range	15.9-103.4	15.4-106.2	15.4-106.2
Sex:
Men	53 409 (34.5)	50 529 (42.1)	103 938 (37.8)
Women	101 587 (65.5)	69 488 (57.9)	171 075 (62.2)
ASA (American Society of Anesthesiologists) grade:
1	22 336 (14.4)	24 276 (20.2)	46 612 (17.0)
2	107 395 (69.3)	82 104 (68.4)	189 499 (68.9)
3	24 369 (15.7)	13 151 (11.0)	37 520 (13.6)
4	852 (0.6)	456 (0.4)	1308 (0.5)
5	44 (0.03)	30 (0.02)	74 (0.03)
Surgery
Approach:
Anterior	485 (0.3)	429 (0.4)	914 (0.4)
Anterolateral	12 223 (8.6)	7161 (6.1)	19 384 (7.5)
Hardinge	34 366 (24.1)	28 834 (24.7)	63 200 (24.3)
Lateral (incl Hardinge)	30 137 (21.1)	14 321 (12.3)	44 458 (17.1)
Posterior	59 855 (41.9)	61 086 (52.3)	120 941 (46.6)
Trochanteric osteotomy	1164 (0.8)	96 (0.1)	1260 (0.5)
Other	4620 (3.2)	4989 (4.3)	9609 (3.7)
Missing	12 146 (7.8)	3101 (2.6)	15 247 (5.5)
Complexity of procedure:
Primary	141 825 (91.5)	119 172 (99.3)	260 997 (94.9)
Complex primary	13 171 (8.5)	845 (0.7)	14 016 (5.1)
Both sides:
No	154 798 (99.9)	119 497 (99.6)	274 295 (99.7)
Yes	198 (0.1)	520 (0.4)	718 (0.3)
Follow-up
Endpoint:
Death	11 745 (7.6)	3728 (3.1)	15 473 (5.6)
Revision	1589 (1.0)	1917 (1.6)	3506 (1.3)
Unrevised	141 662 (91.4)	114 372 (95.3)	256 034 (93.1)
Total length of follow-up, person years	535 035	323 477	858 512